There's a Search button at the top of the page that searches all the forums based on a keyword or number of keywords. This also works for the individual forums. When you click, say "Zelda Favorites" for example, and you want to make sure that there isn't already a thread about "Favorite Zelda Game" or "Title", you would click the Search button at the top and type in the words "Favorite Game Title", and see what comes up.